IN TODAY'S RADIO REPORT: Heartbreaking tragedy as powerful tornadoes rip across Alabama; Down Under shatters its record for hottest summer nationally; Republican rhetoric increasingly unhinged about the Green New Deal at CPAC; Senate confirms former coal lobbyist as permanent EPA chief; PLUS: The 2020 Democratic presidential race keeps growing, with pledges to act on climate change... All that and more in today's Green News Report!

The path of destruction from the EF-4 is at least 24 miles long, said Chris Darden, meteorologist in charge at the National Weather Service's Birmingham office. The path was likely longer, because the twister crossed into Georgia. Officials there are still assessing the damage, Darden said...The path of destruction looks "as if someone had taken a blade and just scraped the ground," Sheriff Jay Jones said.

The severity of these twisters confirms a trend that scientists have been monitoring for years: Tornado outbreaks in the Southeastern US are getting worse...A 2016 study found that the average number of tornadoes in these outbreaks has increased since 1954, from 10 to 15. Between 1972 and 2010, outbreaks were associated with 79% of all tornado fatalities. The chance of these extreme outbreaks has also increased.

“Ultimately I’m running for president because I believe that not only can I beat Donald Trump, but that I am the person that can bring people together on the other side and actually get stuff done. The division is keeping us from addressing big issues like climate change and the soaring costs of health care.”

To stabilize global temperature, net carbon dioxide emissions must be reduced to zero. The window of time is rapidly closing to reduce emissions and limit warming to no more than 3.6 degrees Fahrenheit or 2 degrees Celsius above preindustrial levels, the goal set in the Paris climate accord. The further we push the climate system beyond historical conditions, the greater the risks of potentially unforeseen and even catastrophic changes to the climate - so every reduction in emissions helps.

Clean-energy enthusiasts frequently claim that we can go bigger, that it's possible for the whole world to run on renewables - we merely lack the "political will." So, is it true? Do we know how get to an all-renewables system? Not yet. Not really.